(19)
(11) EP 3 332 916 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.08.2018 Bulletin 2018/33

(43) Date of publication A2:
13.06.2018 Bulletin 2018/24

(21) Application number: 17205914.9

(22) Date of filing: 07.12.2017
(51) International Patent Classification (IPC): 
B25C 1/04(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD TN

(30) Priority: 08.12.2016 CN 201621342224 U

(71) Applicant: TTI (Macao Commercial Offshore) Limited
Macao (MO)

(72) Inventors:
  • TAN, Ying Xiang
    Dongguan City, Guangdong (CN)
  • LIN, Hai Ling
    Dongguan City, Guangdong (CN)

(74) Representative: Stevenson-Hill, Jack Patrick et al
Marks & Clerk LLP 1 New York Street
Manchester M1 4HD
Manchester M1 4HD (GB)

   


(54) PNEUMATIC TOOL


(57) A pneumatic tool including a cylinder, a piston inside the cylinder and adapted to reciprocate, and a piston rod connected to the piston. The piston has a first seal ring and a second seal ring fixed thereto. The first seal ring and the second seal ring are spaced apart along the cylinder axial direction and a storage space for storing lubricating oil is defined between the first seal ring and the second seal ring. The pneumatic tool in the disclosure may effectively avoid the problems that the frictional force increases because of the lubricating oil depleting due to the use of the tool for a long time, and even worse the pneumatic tool does not work effectively.







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